Hey, good start! The feeling of cresting a sand dune on the hover board and cruising off it is very cool. And with the bow, I see where you're going with that. The smooth movement of the hover board will combine well with a projectile.
At this point in the project, I think it would be worth it to really get the movement and controls keyed in. Getting the camera, player animations, board movement, etc... all feeling super smooth and tight. There's lots of potential with the feel of the hoverboard on sand too. Imagine cutting hard one way or the other, and "biting" the board into the sand to turn, shooting up a big rooster tail of sand. Or doing a sort of "melon-grab" on the board, to get a little extra air time. Building up speed as you go down a huge dune.
Speaking of, make some way bigger dunes! I want to cruise down a fuckhuge dune and build up a ton of speed, then hit another smaller one like a ramp and go flying. That would be fun.
Keep it up.